Excavating-scraper.



C. H. DISHMAN.

EXGAVATING SORAPER.

APPLIOATION FILED AUG. 9, 1910.

Patented Apr. 16, 1912.

2 SHEETS-SHEET 1.

COLUMBIA PLANOGRAPH cm. WASHINGTON, D. c.

ITED srawnnr ()FFICE.

CHARLES H. DISHMAN, OF HENDERSON, KENTUCKY.

EXCAVATING-SCRAPER.

Specification of Letters Patent.

Patented Apr. 16, 1912.

Application filed August 9, 1910. Serial No. 576,330.

To all whom it may concern:

Be it known that I, CHARLES H. DIsHMAN, a citizen of the United States,residing at Henderson, county of Henderson, and State of Kentucky, haveinvented certain new and useful Improvements in Excavating- Scrapers, ofwhich the following is a specification.

This

scrapers.

The present invention relates to those excavating scrapers employing aderrick suspended bucket or scoop, such as are particularly used inrailroad work, and it has for its object the provision of a scraperconstructed and operated in a novel manner which may be readilymanipulated by a new arrangement of cables, so that it can be hoisted orlowered, moved from the excavation pit to the spoil, and readily dumped.

The object of the invention is accomplished by the provision of certainnovel attachments on the excavating scoop or bucket, combined withcables operated from the winding drums in a manner which will be fullyset forth hereinafter.

In the accompanying drawings :Figure l is a side elevation showing theinvention in useon an approved form of steam derrick; Fig. 2, anenlarged side elevation of the scoop or bucket reversed from theposition shown. in Fig. 1; Fig. 3, a plan view thereof; and Fig. 1, avertical section on the line H of Fig. 2.

Referring first to Fig. 1, the winding drums l and 2 are those of anyapproved form used on the steam derrick shown, the latter having theusual jib 3.

My invention relates solely to the excavating scraper or bucket 4 andits attachments, together with the cables 5 and 6 which wind on thedrums 1 and 2, respectively.

The scoop or excavating bucket 4 is provided with the usual open top andis open at one end and it has the usual knife or points 7. Carried byopposite sides of the scoop or bucket 4 are uprlght plates 8, each ofwhich has a sheave 9 and idlers 10 and invention relates to excavatingl1. Pivoted at 12 to opposite sides of the excavating scoop or bucketare the arms 13 which are adapted to swing to a more or lesshorizontal-and to a more or less vertical position. These arms areconnected to the cable 6 so that they move in unison, and they are alsoconnected to the cable 5 by the branches 14 and 15 which pass aroundidlers 16 disposed near the bottom of the excavator scoop, and thencebetween the sheaves 9 and idlers 11 and finally they run against theidlers 10. On the sides of the scoop or bucket 4 are abutment plates 17,against which the arms 13 strike when they are in their lowered and moreor less vertical position.

In the operation of the excavator the derrick and the jib aremanipulated in the usual manner. When the knife 7 is taking into theexcavation pit, the drum 2 is in action and the cable 6 is drawn taut,being in the position shown in Fig. 1, the drum 1 being slightly let outto compensate for the travel of the scoop or shovel. When the scoop orshovel is loaded, both of the drums 1 and 2- draw upon the cables 5 and6 and make them taut, but the swinging arms 13 are then against theabutments 17 giving a truss-like effect in connection with tension onboth cables and when the scraper is swung from the pit to the spoilbank, it will be kept horizontal, the suspending cable 5 carrying thegreater part of the load and the tension on both the cables causing theknife or cutting edge to be held up so that the dirt cannot fall out.When it is desired to dump the scoop, the cable 6 is paid out and thescoop then turns to an upright position on account of the release of thetension of the cable 6 on the swinging arms 13.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent, is

In an excavating scraper, the combination with an excavating scoop, ofswinging arms carried on one end part thereof, a sheave on the scoop, asuspending cable which runs over said sheave and thence angularly to itssuspending stretch and is connected to the arms aforesaid and adapted topull them in one direction, and a free pulling cable In testimonywhereof, I hereunto aflix my directly connected to the arms and adaptedsignature in presence of tWo Witnesses. to pull them in the oppositedirection, said arms being adapted for movement only by CHARLES I 5 thecombined paying out of one cable and Witnesses:

the tension of the other cable to efiect sus- CHARLES H. ROBERTS,

pending or tilting of the scoop. F. C. GORE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

